1887

Abstract

Summary

The reticular structure previously described on the original 1233 strain of influenza C was found on two further strains of influenza C.

In negatively stained preparations of influenza C three kinds of particles with different surface morphology have been found: particles with ‘spikes’ typical of myxovirus, particles with a hexagonal reticular surface and ‘naked’ particles with no reticular structure.

The fine structures of influenza viruses A and C as seen in thin sections were compared. In walls of influenza A the structures encountered from the surface inwards were: a layer of spikes hollow and open at both ends; an electron-transparent layer of uniform width; and a finely granulated layer. The electron-transparent layer of influenza C virus was much less prominent; the spikes were irregularly placed and often absent. On sectioned influenza C filaments a hexagonal pattern was seen. The internal component of influenza A virus measured about 6 nm. in diameter and sometimes appeared to be hollow. The internal component of influenza C measured about 9 nm. across and appeared to be helical.

On the basis of these results the taxonomic position of influenza C has been questioned.

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/content/journal/jgv/10.1099/0022-1317-4-3-365
1969-04-01
2022-01-25
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